My iPad 1s performance is extreremely poor on ios5. Apps crash every few minutes, and evything overall is slower. iOS 4 was much better, and ios3 was ever better then that. If I could, I would certainly go back to ios4, but stupid apple won't allow it. Now I have a useless pile of garbage. I'm am guessing apple won't fix it, as they are likely hoping you will upgrade to a new device.